Removable arch section for industrial heating furnaces



Jan, 18, 1955 E. w. BOWMAN REMOVABLE ARCH SECTION FOR INDUSTRIAL HEATING FURNACES Filed Sept. 2, 1950 2 Sheets-Sheet 1.

JNVENTOR.

Jan. 18, 1955 E. w. BOWMAN 2,599,741

REMOVABLE ARCH SECTION FOR INDUSTRIAL HEATING FURNACES Filed Sept. 2. 1950 2 Sheets-Sheet 2 I f/ I *TTFTWF n a //i INVENTOR- to interact with the T-slots of United States Patent Ofifice Patented Jan. 18, 1955 REMOVABLE ARCH SECTION FOR INDUSTRIAL HEATING FURNACES Edward W. Bowman, Washington, Pa., assignor to Laclede-Christy Company, St. Louis, Mo., a corporation of Missouri Application September 2, 1950, Serial No. 182,943 2 Claims. (Cl. 110-99) This invention relates to new and useful improvements in wall structures for industrial furnaces, more particularly to sectional walls for use in furnace roofs or arches, and it is among the objects thereof to provide furnace structures in which the arch wall is constructed in a manner to be removable in sections for convenience of repair and to provide access to the interior of the furnace for repairs and the like.

Another object of the invention is to provide a means whereby the tile sections forming the arch wall are mounted upon a casting and means are provided for preventing longitudinal movement of the sections after the same have been assembled on the casting.

The invention will become more apparent from a consideration of the accompanying drawing, constituting a part hereof, in which like reference characters designate like parts, and in which:

ig. 1 is a vertical cross-sectional view of a suspended arch structure embodying the principles of this invention;

Fig. 2 a cross-sectional view thereof taken along the line 22, Fig. l; and

Fig. 3 is a vertical cross-sectional view taken longitudinally of a continuous furnace showing the adaptation of the invention to the roof or arch structure thereof.

With reference to Fig. 3, numeral 1 designates a sloping hearth of a continuous furnace which is no part of the present invention. Numeral 2 designates the roof or arch structure, the shape and form of which is old in the art, except in accordance with the present invention portions thereof, generally designated by the numerals 3 and 4, are suspended from a frame structure, generally designated by the numeral 5, supported on hangers 6. The entire roof or arch may be constructed of sections of the types of 3 and 4, or such may be spaced at intervals. For convenience, the sections 3 and 4 may be termed manhole covers, inasmuch as if one of them is removed it would provide an opening through which a workman could enter the cooled off furnace for repairs or replacement of the hearth or side wall parts.

The sections 3 and 4 are illustrated in detail in Figs. 1 and 2 and consist of channels 7 suspended from the hangers 6 to which are clamped castings 8 having a T-shaped bottom edging 9 that fits in T-slots 10 of hanger tile or brick of clay, silica, basic or other refractory material. The supporting brackets 8 have a shoulder 11a on which rest ears 12 of what may be termed a lift casting or hanger bar 13, the lower end of which is shaped, as shown in the cross-sectional view of Fig. 2, hanger brick or tile 14, the lift casting 13 is secured to a box shaped member 19 by means of bolts 20 extending therethrough. Perforated lugs 15 are provided for hoist hooks 15a or the like by which the lift casting 13 is raised or lowered. The end tile 14 supported on the lift casting is offset to interact with a similar offset face of an adjacent tile 16 which is suspended from the bracket 8 to provide a distorted path which may be sealed.

As shown in Fig. 1 of the drawings, the lift casting 13 is provided with depending ears 17 for retaining the end tile 14 against lateral displacement. The depending ears 17 comprise L-shaped retaining members which are secured to the box frame 19 by bolts 18 which extend through the box shape frame and which permit the re moval of the depending ears when the tile sections are assembled on the T-shaped bottom edge 9 of the casting 13.

With reference to Fig. 3 of the drawing, the two lift sections 3 and 4, while supported on the brackets 8, may be removed by simply hoisting them, leaving the brackets 8 with their own suspended tile that extends between the sections 3 and 4.

Furnaces having their roofs constructed in the manner shown in Fig. 3 may be rapidly cooled by simply raising the lift castings to make them available for repairs. The application is especially desirable on reheat furnaces, continuous furnaces, and even open hearth furnace structures. Although more apparent from the views of Figs. 1 and 3, the lift casting may support a couple of tile, as shown in Fig. 2, or all of the tile for the entire width or span of the arch, such being a matter of the provision of a suflicient number of hanger elements 13 for supporting the tile.

Although one embodiment of the invention has been herein illustrated and described, it will be apparent to those skilled in the art that various modifications may be made in the details of construction without departing from the principles herein set forth.

I claim:

1. In an industrial heating furnace, a sectional wall structure comprising a pair of laterally spaced angle brackets for supporting tile having aligned longitudinally extending depending offset portions for interlocking with complementary shaped recesses of refractory tile, said supporting brackets having shoulders at the top olfset depending portions and constituting supporting abutments, a tile support comprising hanger bars having longitudinally extending ears at their respective ends for resting upon the shoulder abutments of said spaced angle brackets to constitute a removable section, said hanger bars having their lower portions shaped for interlocking engagement with complementary shaped recesses of refractory tile and being in alignment with the depending tile interlocking shaped portions of said spaced angle brackets, rows of tile having recesses for engagement over the interlocking ends of the angle brackets and the hanger bars to form a continuous refractory wall, and retaining means extending from said tile support below the upper edge of the tile to prevent displacement of the tile suspended thereon.

2. In an industrial heating furnace, a sectional wall structure comprising a pair of laterally spaced angle brackets for supporting tile having aligned longitudinally extending depending offset portions for interlocking with complementary shaped recesses of refractory tile, said supporting brackets having shoulders at the top of said depending portion and constituting supporting abutments, a tile support comprising hanger bars having longitudinally extending ears at their respective ends for resting upon the shoulder abutments of said spaced angle brackets to constitute a removable section, said hanger bars having their lower portions shaped for interlocking engagement with complementary shaped recesses of refractory tile and being in alignment with the depending tile interlocking shaped portions of said spaced angle brackets, rows of tile having recesses for engagement over the interlocking ends of the angle brackets and the hanger bars to form a continuous refractory wall, and retaining means extending from said tile support below the upper edge of the tile to prevent displacement of the tile suspended thereon, the juxtaposed end tile supported on the angle brackets and the han er bars having offset faces to overlap to form a staggered joint.

References Cited in the file of this patent UNITED STATES PATENTS 1,284,066 Dietrick Nov. 5, 1918 1,309,435 Hosbein July 8, 1919 1,544,154 Hosbein June 30, 1925 1,718,671 Walsh June 25, 1929 1,870,615 Ellman Aug. 9, 1932 1,885,800 Burnet Nov. 1, 1932 2,457,965 Young Jan. 4, 1949 

